<?php $no = 0; $start = new DateTime('2013-01-01'); $end = new DateTime('2013-04-30'); $interval = DateInterval::createFromDateString('1 day'); $period = new DatePeriod($start, $interval, $end); foreach ($period as $dt) { if ($dt->format('N') == 7) { $no++; } } echo $no;
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